arch/powerpc/kvm/powerpc.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/err.h>
  23 #include <linux/kvm_host.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/hrtimer.h>
  26 #include <linux/fs.h>
  27 #include <linux/slab.h>
  28 #include <asm/cputable.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/kvm_ppc.h>
  31 #include <asm/tlbflush.h>
  32 #include <asm/cputhreads.h>
  33 #include "timing.h"
  34 #include "../mm/mmu_decl.h"
  35
  36 #define CREATE_TRACE_POINTS
  37 #include "trace.h"
  38
  39 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  40 {
  41         return !(v->arch.shared->msr & MSR_WE) ||
  42                !!(v->arch.pending_exceptions) ||
  43                v->requests;
  44 }
  45
  46 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
  47 {
  48         int nr = kvmppc_get_gpr(vcpu, 11);
  49         int r;
  50         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
  51         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
  52         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
  53         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
  54         unsigned long r2 = 0;
  55
  56         if (!(vcpu->arch.shared->msr & MSR_SF)) {
  57                 /* 32 bit mode */
  58                 param1 &= 0xffffffff;
  59                 param2 &= 0xffffffff;
  60                 param3 &= 0xffffffff;
  61                 param4 &= 0xffffffff;
  62         }
  63
  64         switch (nr) {
  65         case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
  66         {
  67                 vcpu->arch.magic_page_pa = param1;
  68                 vcpu->arch.magic_page_ea = param2;
  69
  70                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
  71
  72                 r = HC_EV_SUCCESS;
  73                 break;
  74         }
  75         case HC_VENDOR_KVM | KVM_HC_FEATURES:
  76                 r = HC_EV_SUCCESS;
  77 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
  78                 /* XXX Missing magic page on 44x */
  79                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
  80 #endif
  81
  82                 /* Second return value is in r4 */
  83                 break;
  84         default:
  85                 r = HC_EV_UNIMPLEMENTED;
  86                 break;
  87         }
  88
  89         kvmppc_set_gpr(vcpu, 4, r2);
  90
  91         return r;
  92 }
  93
  94 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
  95 {
  96         int r = false;
  97
  98         /* We have to know what CPU to virtualize */
  99         if (!vcpu->arch.pvr)
 100                 goto out;
 101
 102         /* PAPR only works with book3s_64 */
 103         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
 104                 goto out;
 105
 106 #ifdef CONFIG_KVM_BOOK3S_64_HV
 107         /* HV KVM can only do PAPR mode for now */
 108         if (!vcpu->arch.papr_enabled)
 109                 goto out;
 110 #endif
 111
 112         r = true;
 113
 114 out:
 115         vcpu->arch.sane = r;
 116         return r ? 0 : -EINVAL;
 117 }
 118
 119 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 120 {
 121         enum emulation_result er;
 122         int r;
 123
 124         er = kvmppc_emulate_instruction(run, vcpu);
 125         switch (er) {
 126         case EMULATE_DONE:
 127                 /* Future optimization: only reload non-volatiles if they were
 128                  * actually modified. */
 129                 r = RESUME_GUEST_NV;
 130                 break;
 131         case EMULATE_DO_MMIO:
 132                 run->exit_reason = KVM_EXIT_MMIO;
 133                 /* We must reload nonvolatiles because "update" load/store
 134                  * instructions modify register state. */
 135                 /* Future optimization: only reload non-volatiles if they were
 136                  * actually modified. */
 137                 r = RESUME_HOST_NV;
 138                 break;
 139         case EMULATE_FAIL:
 140                 /* XXX Deliver Program interrupt to guest. */
 141                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
 142                        kvmppc_get_last_inst(vcpu));
 143                 r = RESUME_HOST;
 144                 break;
 145         default:
 146                 BUG();
 147         }
 148
 149         return r;
 150 }
 151
 152 int kvm_arch_hardware_enable(void *garbage)
 153 {
 154         return 0;
 155 }
 156
 157 void kvm_arch_hardware_disable(void *garbage)
 158 {
 159 }
 160
 161 int kvm_arch_hardware_setup(void)
 162 {
 163         return 0;
 164 }
 165
 166 void kvm_arch_hardware_unsetup(void)
 167 {
 168 }
 169
 170 void kvm_arch_check_processor_compat(void *rtn)
 171 {
 172         *(int *)rtn = kvmppc_core_check_processor_compat();
 173 }
 174
 175 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 176 {
 177         if (type)
 178                 return -EINVAL;
 179
 180         return kvmppc_core_init_vm(kvm);
 181 }
 182
 183 void kvm_arch_destroy_vm(struct kvm *kvm)
 184 {
 185         unsigned int i;
 186         struct kvm_vcpu *vcpu;
 187
 188         kvm_for_each_vcpu(i, vcpu, kvm)
 189                 kvm_arch_vcpu_free(vcpu);
 190
 191         mutex_lock(&kvm->lock);
 192         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
 193                 kvm->vcpus[i] = NULL;
 194
 195         atomic_set(&kvm->online_vcpus, 0);
 196
 197         kvmppc_core_destroy_vm(kvm);
 198
 199         mutex_unlock(&kvm->lock);
 200 }
 201
 202 void kvm_arch_sync_events(struct kvm *kvm)
 203 {
 204 }
 205
 206 int kvm_dev_ioctl_check_extension(long ext)
 207 {
 208         int r;
 209
 210         switch (ext) {
 211 #ifdef CONFIG_BOOKE
 212         case KVM_CAP_PPC_BOOKE_SREGS:
 213 #else
 214         case KVM_CAP_PPC_SEGSTATE:
 215         case KVM_CAP_PPC_PAPR:
 216 #endif
 217         case KVM_CAP_PPC_UNSET_IRQ:
 218         case KVM_CAP_PPC_IRQ_LEVEL:
 219         case KVM_CAP_ENABLE_CAP:
 220                 r = 1;
 221                 break;
 222 #ifndef CONFIG_KVM_BOOK3S_64_HV
 223         case KVM_CAP_PPC_PAIRED_SINGLES:
 224         case KVM_CAP_PPC_OSI:
 225         case KVM_CAP_PPC_GET_PVINFO:
 226 #ifdef CONFIG_KVM_E500
 227         case KVM_CAP_SW_TLB:
 228 #endif
 229                 r = 1;
 230                 break;
 231         case KVM_CAP_COALESCED_MMIO:
 232                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 233                 break;
 234 #endif
 235 #ifdef CONFIG_KVM_BOOK3S_64_HV
 236         case KVM_CAP_SPAPR_TCE:
 237                 r = 1;
 238                 break;
 239         case KVM_CAP_PPC_SMT:
 240                 r = threads_per_core;
 241                 break;
 242         case KVM_CAP_PPC_RMA:
 243                 r = 1;
 244                 /* PPC970 requires an RMA */
 245                 if (cpu_has_feature(CPU_FTR_ARCH_201))
 246                         r = 2;
 247                 break;
 248         case KVM_CAP_SYNC_MMU:
 249                 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
 250                 break;
 251 #endif
 252         default:
 253                 r = 0;
 254                 break;
 255         }
 256         return r;
 257
 258 }
 259
 260 long kvm_arch_dev_ioctl(struct file *filp,
 261                         unsigned int ioctl, unsigned long arg)
 262 {
 263         return -EINVAL;
 264 }
 265
 266 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 267                                    struct kvm_memory_slot *memslot,
 268                                    struct kvm_memory_slot old,
 269                                    struct kvm_userspace_memory_region *mem,
 270                                    int user_alloc)
 271 {
 272         return kvmppc_core_prepare_memory_region(kvm, mem);
 273 }
 274
 275 void kvm_arch_commit_memory_region(struct kvm *kvm,
 276                struct kvm_userspace_memory_region *mem,
 277                struct kvm_memory_slot old,
 278                int user_alloc)
 279 {
 280         kvmppc_core_commit_memory_region(kvm, mem);
 281 }
 282
 283
 284 void kvm_arch_flush_shadow(struct kvm *kvm)
 285 {
 286 }
 287
 288 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 289 {
 290         struct kvm_vcpu *vcpu;
 291         vcpu = kvmppc_core_vcpu_create(kvm, id);
 292         vcpu->arch.wqp = &vcpu->wq;
 293         if (!IS_ERR(vcpu))
 294                 kvmppc_create_vcpu_debugfs(vcpu, id);
 295         return vcpu;
 296 }
 297
 298 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 299 {
 300         /* Make sure we're not using the vcpu anymore */
 301         hrtimer_cancel(&vcpu->arch.dec_timer);
 302         tasklet_kill(&vcpu->arch.tasklet);
 303
 304         kvmppc_remove_vcpu_debugfs(vcpu);
 305         kvmppc_core_vcpu_free(vcpu);
 306 }
 307
 308 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 309 {
 310         kvm_arch_vcpu_free(vcpu);
 311 }
 312
 313 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 314 {
 315         return kvmppc_core_pending_dec(vcpu);
 316 }
 317
 318 /*
 319  * low level hrtimer wake routine. Because this runs in hardirq context
 320  * we schedule a tasklet to do the real work.
 321  */
 322 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
 323 {
 324         struct kvm_vcpu *vcpu;
 325
 326         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
 327         tasklet_schedule(&vcpu->arch.tasklet);
 328
 329         return HRTIMER_NORESTART;
 330 }
 331
 332 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 333 {
 334         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 335         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
 336         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
 337         vcpu->arch.dec_expires = ~(u64)0;
 338
 339 #ifdef CONFIG_KVM_EXIT_TIMING
 340         mutex_init(&vcpu->arch.exit_timing_lock);
 341 #endif
 342
 343         return 0;
 344 }
 345
 346 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 347 {
 348         kvmppc_mmu_destroy(vcpu);
 349 }
 350
 351 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 352 {
 353 #ifdef CONFIG_BOOKE
 354         /*
 355          * vrsave (formerly usprg0) isn't used by Linux, but may
 356          * be used by the guest.
 357          *
 358          * On non-booke this is associated with Altivec and
 359          * is handled by code in book3s.c.
 360          */
 361         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
 362 #endif
 363         kvmppc_core_vcpu_load(vcpu, cpu);
 364         vcpu->cpu = smp_processor_id();
 365 }
 366
 367 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 368 {
 369         kvmppc_core_vcpu_put(vcpu);
 370 #ifdef CONFIG_BOOKE
 371         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
 372 #endif
 373         vcpu->cpu = -1;
 374 }
 375
 376 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 377                                         struct kvm_guest_debug *dbg)
 378 {
 379         return -EINVAL;
 380 }
 381
 382 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
 383                                      struct kvm_run *run)
 384 {
 385         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
 386 }
 387
 388 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
 389                                       struct kvm_run *run)
 390 {
 391         u64 uninitialized_var(gpr);
 392
 393         if (run->mmio.len > sizeof(gpr)) {
 394                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
 395                 return;
 396         }
 397
 398         if (vcpu->arch.mmio_is_bigendian) {
 399                 switch (run->mmio.len) {
 400                 case 8: gpr = *(u64 *)run->mmio.data; break;
 401                 case 4: gpr = *(u32 *)run->mmio.data; break;
 402                 case 2: gpr = *(u16 *)run->mmio.data; break;
 403                 case 1: gpr = *(u8 *)run->mmio.data; break;
 404                 }
 405         } else {
 406                 /* Convert BE data from userland back to LE. */
 407                 switch (run->mmio.len) {
 408                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
 409                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
 410                 case 1: gpr = *(u8 *)run->mmio.data; break;
 411                 }
 412         }
 413
 414         if (vcpu->arch.mmio_sign_extend) {
 415                 switch (run->mmio.len) {
 416 #ifdef CONFIG_PPC64
 417                 case 4:
 418                         gpr = (s64)(s32)gpr;
 419                         break;
 420 #endif
 421                 case 2:
 422                         gpr = (s64)(s16)gpr;
 423                         break;
 424                 case 1:
 425                         gpr = (s64)(s8)gpr;
 426                         break;
 427                 }
 428         }
 429
 430         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 431
 432         switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
 433         case KVM_REG_GPR:
 434                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
 435                 break;
 436         case KVM_REG_FPR:
 437                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 438                 break;
 439 #ifdef CONFIG_PPC_BOOK3S
 440         case KVM_REG_QPR:
 441                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 442                 break;
 443         case KVM_REG_FQPR:
 444                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 445                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
 446                 break;
 447 #endif
 448         default:
 449                 BUG();
 450         }
 451 }
 452
 453 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 454                        unsigned int rt, unsigned int bytes, int is_bigendian)
 455 {
 456         if (bytes > sizeof(run->mmio.data)) {
 457                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 458                        run->mmio.len);
 459         }
 460
 461         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 462         run->mmio.len = bytes;
 463         run->mmio.is_write = 0;
 464
 465         vcpu->arch.io_gpr = rt;
 466         vcpu->arch.mmio_is_bigendian = is_bigendian;
 467         vcpu->mmio_needed = 1;
 468         vcpu->mmio_is_write = 0;
 469         vcpu->arch.mmio_sign_extend = 0;
 470
 471         return EMULATE_DO_MMIO;
 472 }
 473
 474 /* Same as above, but sign extends */
 475 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
 476                         unsigned int rt, unsigned int bytes, int is_bigendian)
 477 {
 478         int r;
 479
 480         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
 481         vcpu->arch.mmio_sign_extend = 1;
 482
 483         return r;
 484 }
 485
 486 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
 487                         u64 val, unsigned int bytes, int is_bigendian)
 488 {
 489         void *data = run->mmio.data;
 490
 491         if (bytes > sizeof(run->mmio.data)) {
 492                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
 493                        run->mmio.len);
 494         }
 495
 496         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
 497         run->mmio.len = bytes;
 498         run->mmio.is_write = 1;
 499         vcpu->mmio_needed = 1;
 500         vcpu->mmio_is_write = 1;
 501
 502         /* Store the value at the lowest bytes in 'data'. */
 503         if (is_bigendian) {
 504                 switch (bytes) {
 505                 case 8: *(u64 *)data = val; break;
 506                 case 4: *(u32 *)data = val; break;
 507                 case 2: *(u16 *)data = val; break;
 508                 case 1: *(u8  *)data = val; break;
 509                 }
 510         } else {
 511                 /* Store LE value into 'data'. */
 512                 switch (bytes) {
 513                 case 4: st_le32(data, val); break;
 514                 case 2: st_le16(data, val); break;
 515                 case 1: *(u8 *)data = val; break;
 516                 }
 517         }
 518
 519         return EMULATE_DO_MMIO;
 520 }
 521
 522 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 523 {
 524         int r;
 525         sigset_t sigsaved;
 526
 527         if (vcpu->sigset_active)
 528                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 529
 530         if (vcpu->mmio_needed) {
 531                 if (!vcpu->mmio_is_write)
 532                         kvmppc_complete_mmio_load(vcpu, run);
 533                 vcpu->mmio_needed = 0;
 534         } else if (vcpu->arch.dcr_needed) {
 535                 if (!vcpu->arch.dcr_is_write)
 536                         kvmppc_complete_dcr_load(vcpu, run);
 537                 vcpu->arch.dcr_needed = 0;
 538         } else if (vcpu->arch.osi_needed) {
 539                 u64 *gprs = run->osi.gprs;
 540                 int i;
 541
 542                 for (i = 0; i < 32; i++)
 543                         kvmppc_set_gpr(vcpu, i, gprs[i]);
 544                 vcpu->arch.osi_needed = 0;
 545         } else if (vcpu->arch.hcall_needed) {
 546                 int i;
 547
 548                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
 549                 for (i = 0; i < 9; ++i)
 550                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
 551                 vcpu->arch.hcall_needed = 0;
 552         }
 553
 554         r = kvmppc_vcpu_run(run, vcpu);
 555
 556         if (vcpu->sigset_active)
 557                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 558
 559         return r;
 560 }
 561
 562 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
 563 {
 564         int me;
 565         int cpu = vcpu->cpu;
 566
 567         me = get_cpu();
 568         if (waitqueue_active(vcpu->arch.wqp)) {
 569                 wake_up_interruptible(vcpu->arch.wqp);
 570                 vcpu->stat.halt_wakeup++;
 571         } else if (cpu != me && cpu != -1) {
 572                 smp_send_reschedule(vcpu->cpu);
 573         }
 574         put_cpu();
 575 }
 576
 577 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
 578 {
 579         if (irq->irq == KVM_INTERRUPT_UNSET) {
 580                 kvmppc_core_dequeue_external(vcpu, irq);
 581                 return 0;
 582         }
 583
 584         kvmppc_core_queue_external(vcpu, irq);
 585         kvm_vcpu_kick(vcpu);
 586
 587         return 0;
 588 }
 589
 590 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 591                                      struct kvm_enable_cap *cap)
 592 {
 593         int r;
 594
 595         if (cap->flags)
 596                 return -EINVAL;
 597
 598         switch (cap->cap) {
 599         case KVM_CAP_PPC_OSI:
 600                 r = 0;
 601                 vcpu->arch.osi_enabled = true;
 602                 break;
 603         case KVM_CAP_PPC_PAPR:
 604                 r = 0;
 605                 vcpu->arch.papr_enabled = true;
 606                 break;
 607 #ifdef CONFIG_KVM_E500
 608         case KVM_CAP_SW_TLB: {
 609                 struct kvm_config_tlb cfg;
 610                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
 611
 612                 r = -EFAULT;
 613                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
 614                         break;
 615
 616                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
 617                 break;
 618         }
 619 #endif
 620         default:
 621                 r = -EINVAL;
 622                 break;
 623         }
 624
 625         if (!r)
 626                 r = kvmppc_sanity_check(vcpu);
 627
 628         return r;
 629 }
 630
 631 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 632                                     struct kvm_mp_state *mp_state)
 633 {
 634         return -EINVAL;
 635 }
 636
 637 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 638                                     struct kvm_mp_state *mp_state)
 639 {
 640         return -EINVAL;
 641 }
 642
 643 long kvm_arch_vcpu_ioctl(struct file *filp,
 644                          unsigned int ioctl, unsigned long arg)
 645 {
 646         struct kvm_vcpu *vcpu = filp->private_data;
 647         void __user *argp = (void __user *)arg;
 648         long r;
 649
 650         switch (ioctl) {
 651         case KVM_INTERRUPT: {
 652                 struct kvm_interrupt irq;
 653                 r = -EFAULT;
 654                 if (copy_from_user(&irq, argp, sizeof(irq)))
 655                         goto out;
 656                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
 657                 goto out;
 658         }
 659
 660         case KVM_ENABLE_CAP:
 661         {
 662                 struct kvm_enable_cap cap;
 663                 r = -EFAULT;
 664                 if (copy_from_user(&cap, argp, sizeof(cap)))
 665                         goto out;
 666                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
 667                 break;
 668         }
 669
 670 #ifdef CONFIG_KVM_E500
 671         case KVM_DIRTY_TLB: {
 672                 struct kvm_dirty_tlb dirty;
 673                 r = -EFAULT;
 674                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
 675                         goto out;
 676                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
 677                 break;
 678         }
 679 #endif
 680
 681         default:
 682                 r = -EINVAL;
 683         }
 684
 685 out:
 686         return r;
 687 }
 688
 689 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 690 {
 691         return VM_FAULT_SIGBUS;
 692 }
 693
 694 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
 695 {
 696         u32 inst_lis = 0x3c000000;
 697         u32 inst_ori = 0x60000000;
 698         u32 inst_nop = 0x60000000;
 699         u32 inst_sc = 0x44000002;
 700         u32 inst_imm_mask = 0xffff;
 701
 702         /*
 703          * The hypercall to get into KVM from within guest context is as
 704          * follows:
 705          *
 706          *    lis r0, r0, KVM_SC_MAGIC_R0@h
 707          *    ori r0, KVM_SC_MAGIC_R0@l
 708          *    sc
 709          *    nop
 710          */
 711         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
 712         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
 713         pvinfo->hcall[2] = inst_sc;
 714         pvinfo->hcall[3] = inst_nop;
 715
 716         return 0;
 717 }
 718
 719 long kvm_arch_vm_ioctl(struct file *filp,
 720                        unsigned int ioctl, unsigned long arg)
 721 {
 722         void __user *argp = (void __user *)arg;
 723         long r;
 724
 725         switch (ioctl) {
 726         case KVM_PPC_GET_PVINFO: {
 727                 struct kvm_ppc_pvinfo pvinfo;
 728                 memset(&pvinfo, 0, sizeof(pvinfo));
 729                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
 730                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
 731                         r = -EFAULT;
 732                         goto out;
 733                 }
 734
 735                 break;
 736         }
 737 #ifdef CONFIG_KVM_BOOK3S_64_HV
 738         case KVM_CREATE_SPAPR_TCE: {
 739                 struct kvm_create_spapr_tce create_tce;
 740                 struct kvm *kvm = filp->private_data;
 741
 742                 r = -EFAULT;
 743                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
 744                         goto out;
 745                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
 746                 goto out;
 747         }
 748
 749         case KVM_ALLOCATE_RMA: {
 750                 struct kvm *kvm = filp->private_data;
 751                 struct kvm_allocate_rma rma;
 752
 753                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
 754                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
 755                         r = -EFAULT;
 756                 break;
 757         }
 758 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 759
 760         default:
 761                 r = -ENOTTY;
 762         }
 763
 764 out:
 765         return r;
 766 }
 767
 768 int kvm_arch_init(void *opaque)
 769 {
 770         return 0;
 771 }
 772
 773 void kvm_arch_exit(void)
 774 {
 775 }